/Engine/Source/Runtime/GeometryCore/Public/DynamicMeshEditor.h
Pair of associated vertex and edge loops. Assumption is that loop sizes are the same and have a 1-1 correspondence. OuterVertices may include unreferenced vertices, and OuterEdges may include InvalidID edges in that case.
struct FLoopPairSet
bool
bOuterIncludesIsolatedVertices
If true, some OuterVertices are not referenced by any triangles, and the pair of OuterEdges that would touch that vertex are InvalidID
TArray< int32 >
InnerEdges
TArray< int32 >
InnerVertices
TArray< int32 >
OuterEdges
TArray< int32 >
OuterVertices